Granted Patent
Utility
US 4,280,489 · App. 06/141,925
Ankle brace
Inventor:
Glenn W. Johnson, Jr.
Patented Case
View Patent ↗
Granted: Jul 28, 1981
Filed: Apr 21, 1980
Inventor
Glenn W. Johnson, Jr.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.